|Publication number||US7341473 B2|
|Application number||US 10/559,526|
|Publication date||Mar 11, 2008|
|Filing date||May 4, 2004|
|Priority date||May 26, 2003|
|Also published as||DE10323615A1, DE502004008352D1, EP1632009A1, EP1632009B1, US20070099476, WO2004105185A1|
|Publication number||10559526, 559526, PCT/2004/4689, PCT/EP/2004/004689, PCT/EP/2004/04689, PCT/EP/4/004689, PCT/EP/4/04689, PCT/EP2004/004689, PCT/EP2004/04689, PCT/EP2004004689, PCT/EP200404689, PCT/EP4/004689, PCT/EP4/04689, PCT/EP4004689, PCT/EP404689, US 7341473 B2, US 7341473B2, US-B2-7341473, US7341473 B2, US7341473B2|
|Original Assignee||Hirschmann Automation And Control Gmbh|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (25), Referenced by (3), Classifications (6), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application is the US national phase of PCT application PCT/EP2004/004689, filed 4 May 2004, published 2 Dec. 2004 as WO 2004/105185, and claiming the priority of German patent application 10323615.5 itself filed 26 May 2003.
The invention relates to a contact and to a complementary wire seat for a plug or a socket utilizing the plug connection in quick-connect technology and particularly in insertion-piercing connecting technology according to the features of the preamble of claim 1.
An important trend in plug connection technology or cable connection technology is the permanent electrical connection between insulated electrical conductors and corresponding contacts of plug-and-jack connecting devices, apparatus housing, sensory-effector modules, printed circuit board modules and the like in the most rational manner possible, that is with a minimum of cost in time and financially. An important requirement here is that the connection procedure be carried out without the need for additional tools, manually and as much as possible without defect or errors in the connection. In conjunction with this requirement, for example, concepts like “rapid contacting” for quick-connect technology have been developed. The most important contact technology in this field is the insulation-penetrating connection technology in insulation piercing connecting technology or insulation piercing terminal technology, penetration technology, clamping jaw technology and spring-contact technology. A further, very important trend that has contributed to the general technological development in this field is the formation or use of plug connectors and cable-connecting devices that contribute to miniaturization while as a rule maintaining the power aspects of the connector.
One of the important solder-free electrical connections is the press-fit clip connector. EN 60352-3 defines a solder-free connection that is produced by pressing a single wire into a slit provided with precision in a terminal, whereby edges of the press-fit clip cut through the insulating jacket of the conductor and deform the round massive conductor or single wire of the conductor or lead and thereby produce a gas-tight connection. A highly advantageous feature of the press-fit clip is that (metallic) press-fit clip flanks apply the contact force to the metallic conductor symmetrically, that is free from the application of torque, and permanently elastically at a right angle to the wire; creep and relaxation effects are negligible as a result of the workpiece characteristic, as is a loss of the spring force between the metals. By comparison with penetration techniques that only apply to stranded wire conductors, the press-fit clip have the advantage that they can make contact both with solid core and as with stranded-conductor wire. In their known form, an insulation-penetration terminal is so provided that the longitudinal axis of the massive conductor or stranded wire lies perpendicular to a plane defined by the flanks of the insulation-penetration terminal. This means that the entire cable must be generally perpendicular to the plug direction of the plug connector. To the extent required, under these conditions, an alignment between the cable end and the plug direction can only be achieved by a bend, that is taking up additional room and as a rule at additional cost.
A number of tests have been undertaken for the production of plug connectors with insulation-piercing terminals in which the cable is oriented in line with the plug-in direction; in this manner it was hoped to minimize the above-mentioned additional cost or drawbacks. Basically, in this case, either the axis of the electrical conductor was set at an acute angle to the line of the cutting terminal flanks or the cutting terminal was angled at the end region of its slit and via wedge elements, usually elastic or resilient, have the conductor pierced into it (for example DE 100 26 295 or EP 1 158 611).
With the known round plug connectors (plugs or sockets), it has been felt that such plug arrangements could not be readily created with a central contact, since the partial circles or circular segment was defined by the position of the outer contact and must surround the central contact at a relatively small distance and the dimensions must be relatively small to accord with standards. Because of the basic configuration of known press-fit clips and the wire seats provided for them in the appropriate insulating bodies, the place for a central terminal is limited and thus the spectrum of use for such plug connectors is narrowed.
The insulation-penetrating clip or the press-fit arms are straight or planar. In order to generate the requisite contact force, the press-fit clip must be relatively wide in the elastic or spring direction and thus configured to be relatively bulky. This drawback is reinforced because of the place or location consideration for the terminal since the press-fit clip for functional reasons must be perpendicular to the plane in which the conductor wires for the purposes of making contact must be laterally bent or set at an inclination (as for example in EP 1 158 611). A further disadvantage to flat press-fit clips is that they are generally inserted in corresponding channels in the insulating body that also contains the wire seat in which the bends of the conductor wires are contained. These channels fix the press-fit clips in position and ensure that the cutting flanks of the terminal upon penetration of the wire insulation will not in turn be pressed by the wire to the sides. As a result of the reduced contact surfaces that the press-fit clips have in the spring direction, large surface forces develop against the side wall of these bodies that among other things can lead to their damage. This effect has been found especially negative in the case of press-fit clips that are punched out and thus may have rough lateral edges that may have punching burrs.
With plug connectors, plug or socket arrangements of equipments or devices, sensor/effector modules and the like, one deals with electronic components or operating elements that have minimum requirements with respect to the dimensions of or gaps or current-creep paths between electrically conducting parts of different potentials (EN 50178). This standard provides that the finishing tolerances in the mounting and connection of the electronic units (EB) must be considered. In addition, larger spacings and creep paths must be provided especially when the incorporation or connection of the EB takes place before mounting or during mounting or is not altered or when the wiring is carried out anew or is changed during the mounting. The dimensioning of the spacings and creep paths must be considered in light of an expected reduction in them during the operational conditions in the expected environment. These criteria are of great significance especially with respect to the voltage-supplying end of the relatively easily bendable conductor wires and their relatively imprecise lengths.
The invention has as its object the provision of a contact and, in addition, of a wire seat complementary thereto for a plug or a socket of a plug connector in accordance with quick-connect technology and that operate in accordance with the principles of press-fit clip contacts that can avoid the drawbacks described previously.
This object is attained in accordance with the features of patent claim 1.
According to the invention the contact has as at least two press-fit arms that have in cross section a curved and/or polygonal configuration and contact the conductor wires in approximately an axial direction. Press-fit clips with such curved or polygonal flank cross sections, have, apart from the advantage of an especially compact construction, the substantial advantage that for a given spring stiffness or spring constant they have substantially more reduced dimensions in the spring direction than known planar penetrating or cutting terminals that contact the conductor wires generally at a right angle. With such penetrating or cutting terminals, moreover, a plug or socket can be provided for a plug connector in press-fit clip technology that from the aspect of contacting and contact reliability has substantially better properties and in addition a more compact structure than the known plug connector. The shape of the arms of the press-fit clip is reproduced in a wire holder that has wire seats into which the ends of the wires are inserted and there fixed. After insertion of the wires into these wire seats, the press-fit clips are installed axially n the wire holder, that is each press-fit clip contacts a resp wire end. To this end it is further provided according to the invention that the press-fit arms are at least partially fixed nonmovably in the wire holder. In other words the wire holder partially receives the pressure applied during contacting by means of the press-fit clips so that as a result bending pr spreading of the press-fit arms when connected is effectively prevented.
In the following the contact according to the invention and also the complementary wire seat are described more closely with reference to an embodiment, to which the invention is not limited, with reference to the figures.
The outer shape of these openings 7.5.1 conforms either over its entire circumference or only over a part thereof, for example when the press-fit arms 1.4 are supported or guided at specific locations, to the outer shape of the respective press-fit clip while the remaining region is spaced from the press-fit clip. It is important in this regard that the wire holder 7 is made by injection molding so that the x-y projection of the inner shape of the opening 7.5.1 facilitates demolding with the projection of the seat surface 7.4.1 that extends over the deflecting face 7.4 to the deflecting rib 7.2; on the other hand this inner shape corresponds with the lower edge 7.2.3 of the deflecting rib 7.2. The opening 7.5.1 is provided with the entry bevel 7.5.2 that prevents canting of the entering press-fit clip. On the side of the wire holder 7 toward the press-fit arms 1.4 it has at each wire seat 7.1 further openings 7.3 whose number corresponds to the number of deflecting ribs 7.3. It is significant that their shape is larger to allow demolding long the x-y projection of the deflecting ribs 7.3. It is important in any case that the openings 7.3 not be too big so that the smallest possible conductor can be slid through them or the abutment 7.6 would become ineffective. If one is certain that is the x-y projection of the deflecting ribs 7.2 and 7,3 and the deflecting flank 7.4 of the abutment 7.6 do not overlap, the wire seats 7.1 or the entire wire holder can be deformed in a very simple manner along the longitudinal axis z. Further features of the wire holder are the coding or twist preventer 7.9, the guide face 7.16, and the abutment face 7.15 that are important with regard to the contact holder 2. The groove 7.10 serves for holding or guiding the contact 13. The groove-like recess 7.11 also forms a coding or twist preventer for the sleeve 9. The surfaces 7.12 are grip surfaces by means of which the wire holder 7 can be pulled out of the contact holder 2. The wire holder 2 is pressed against the faces 7.13 into the contact holder 2 having the press-fit arms. The test bore 7.14 that extends conically over a portion of its length allows the user to determine if the diameter of the wire to be fitted will go into the wire seat 7.1 of the wire holder 7. The conical surface 7.17 has the function of fixing the contact 8 in the z-direction such that a radial force component is created toward the plug center axis, that is toward the cable shielding. The surface 7.17 can alternatively also be shaped otherwise, for example flat.
In a preferred embodiment that is shown for example in
In the above description the terms “plug” and “socket” intended with the following meaning:
A plug connection can comprise a plug and a socket that are connected together in quick-connect fashion at the end of a cable. serve for electrical connection of the cable by sliding together, screwing together, or the like. Those parts of a plug connection that are joined to a plug can instead of a socket also be called a wire seat, base, or coupling. in addition it is possible that the plug or the socket is not mounted in quick-connect fashion on the end of a cable, but is fixed or releasably mounted on a sensor, an actuator, a piece of equipment, or the like. The terms “plug” or “socket” all are intended to cover any parts necessary n order to plug in a cable. These parts in particular include the contacts that are fixed or fixable in the contact holder, the wire holders, and a casing of the plug or socket in which these named parts are integrated as well as further parts (as for example a connecting nut or connecting screw for screwing on a plug connection, a strain relief, and the like).
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|International Classification||H01R4/24, H01R11/20|
|Cooperative Classification||H01R4/2458, H01R4/2429|
|Jun 5, 2006||AS||Assignment|
Owner name: HIRSCHMANN AUTOMATION AND CONTROL GMBH, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GAIDOSCH, OTHMAR;REEL/FRAME:017973/0774
Effective date: 20060501
|Sep 5, 2011||FPAY||Fee payment|
Year of fee payment: 4
|Sep 11, 2015||FPAY||Fee payment|
Year of fee payment: 8